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Influence of Chromium Endowment and Surface Area of Silica-Alumina Catalysts and of Reaction Conditions on Benzene Synthesis

Published online by Cambridge University Press:  18 July 2016

Peter Becker-Heidmann ,
Achim Hiller  and
Jörg Hofmann
Peter Becker-Heidmann
Affiliation:
Institut für Bodenkunde, Universität Hamburg, Allende-Platz 2, D-20146 Hamburg, Germany
Achim Hiller
Affiliation:
AG Paläoklimatologie, Universität Leipzig, Permoserstraße 15, D-04303 Leipzig, Germany
Jörg Hofmann
Affiliation:
Abteilung Hochtemperaturreaktionen, Institut für Technische Chemie, Universität Leipzig, Germany
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Abstract

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Radiocarbon laboratories using liquid scintillation counting depend on the availability of a catalyst for benzene synthesis. One of the two commonly used is a commercially available chromium-activated silica-alumina catalyst, PKN/D1. As this catalyst will no longer be produced, we have tested similar catalysts as possible replacements. We measured benzene purity by gas chromatography and mass spectrometry, and found that chromium endowment was crucial for a proper catalyst function. The surface area of the catalyst also significantly affected benzene yield and purity. We also studied the effects of different reaction conditions of acetylene absorption and benzene desorption on benzene purity. A catalyst with half of the Cr endowment and doubled specific surface area created yield and purity comparable to PKN/D1.

Type
V. Advances in Measurement Techniques
Information
Radiocarbon , Volume 37 , Issue 2 , 1995 , pp. 717 - 725
Copyright
Copyright © the Department of Geosciences, The University of Arizona 

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